In a study designed to examine the effectiveness of a social skills program for children, 20 children were randomly assigned to one of two groups: a social skills training group or a control group. After 6 weeks, the social skills of participants in each group were measured and compared. The data revealed the following results Social Skills Training Control n = 10 n= 10 M = 7.5 SS = 116 M = 12 SS = 108 A. State the null and alternate hypotheses B. Determine whether the data are sufficient to conclude that a significant difference exists between the groups using a two-tailed test with a = .05 C. Compute Cohen's d and explain what this number tells you

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Bar Graphs

A bar graph is a chart or graphical representation of data. A bar chart, also known as a bar graph, is a graph or chart that displays categorical data using rectangular bars with heights or lengths equal to the values they represent. Typically, bar graphs show categorical and numerical variables grouped in class intervals. A bar graph is useful for comparing and analyzing a set of data.